tests/test-archive-symlinks.out

windows: avoid deleting non-empty reparse points

If a hg repository including working directory is a reparse point (directory
symlinked or a junction point), then using os.removedirs will remove the
reparse point erroneously. This is fixed by only removing directories if they
are empty.

% files
dangling -> nothing
% tar
dangling -> nothing
% zip
dangling -> nothing